What setting should I use on the Nikon D5100 for shooting Holi Festival?

A friend wants me to take pictures with her NIkon D5100 of a Holi festival - she's now participating. I'm still learning on my point n shoot but she wants me to use her camera. What should I set the camera for? It's really bright outside right now and it's taking place in a grassy area by the river

Added (1). I'm experienced in photography just not w/ professional equipment or fully manual operation. The photos turned out great.

As a photographer, I must strongly advise you not to shoot with the D5100 during Holi, unless of course, you are far away from the action. The colored dust and chalk will reap hell on the camera, go inside the body, and destroy it.

use your point and shoot. It is less of a risk.

If you don't have any experience you should probably just use auto mode. It's better than messing up the pictures. And an answer here is not gonna be enough to learn how to set your shutter speed, ISO, aperture and focus.
There's no clear answer to that as it all depends on the situation. You can shoot a perfectly fine image in one spot, then you turn around and take another photo with the same settings and it's overexposed. So you pretty much have to constantly adjust your settings based on the situation.

So my recommendation is set the camera to automatically pick the settings based on the exposure.
If you wanna have a little bit more control, set it to Auto ISO and "Aperture Priority", which is the "A" on the dial. That way you can change the aperture and the camera will adjust the shutter speed accordingly. Since it's a bright day the shutter speed should always be high enough so you don't get motion blur.
By changing the aperture you are changing the depth of field in the image, which basically determines how much of the image is in focus.

If you've never used a DSLR this might be hard to understand, so if you're not sure what you're doing, use Full Auto mode. You can also ask your friend to explain it to you if she's knows how the manual modes work.

You can also shoot half of the images with her camera, and the other half with yours, so you can be sure that you have some good images.