Some samples of volleyball matches to look at : http://www.fivb.org/EN/volleyball/Co...os/PhotosF.asp
Important things : Show faces (expressions) and use multi-frame per shot to increase the chance of getting the right timing and a fast enough shutter speed (probably 1/1000 or faster. Minimum is 1/500-1/1000). Tight crop so that picture shows only one or just a few players in the centre of the action.
Although it's usually not good to just show backside but not sure whether it's good or bad here :
For the East-West seats, the West side (i.e. facing east) is subject to slight back-lit in the morning while the East side is subject to similar effect in the afternoon. So, morning go sit at East side (face west) and then afternoon go sit at West side (face East). (Here I assume that the East side seats face West and West side seats face East).
East-West is good for shots like this :
From the side of the Gallery seat is probably good for this type of angle shots :
From the middle of the gallery seats get this angle :