It really all depends on the lighting. Indoor sports really isn't the specialty of the S-series camera (or any P&S for that matter).
I think you generally get the best low-light performance in Av mode, setting the aperture as wide as it will go and letting the camera pick the appropriate shutter speed. You can get the widest possible aperture (2.7) by NOT zooming. When zooming, the widest aperture you can set is 3.5.
You can check what shutter speed the camera will pick by half-pressing the shutter button. 1/60 is really about the slowest you can go and still get a sharp picture of a (very slightly) moving subject. For sports, you'll want to get faster speeds....
If you aren't getting shutter speeds fast enough to freeze the motion of the subjects, try raising the ISO in steps (start at 80 and switch to 100, 200, 400, 800, and then 1600; each step lets in twice as much light at the cost of noise) until you get an acceptable speed. Try to keep it at 400 or below, if possible, for the least amount of noise.
However, if you just can't get a fast enough shutter speed without going to an ISO of 800 or 1600, most of the noise can be lessened or removed with Noiseware/Noise Ninja/Neat Image/etc. It might look pretty bad at 100% on a computer monitor, but on a 4"x6" print it will hardly be noticeable at all.
