One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,5)(3,7,8,6)(9,10)(11,12)(13,16)(14,15)(17,18)(19,28)(20,31)(21,27)(22,26)(23,25)(24,30)(29,32)(2,5)(6,7)(9,11,14,13)(10,12,15,16)(17,19,22,30)(18,24,26,28)(20,21,29,23)(25,32,27,31)(9,12,11,10,14,16,13,15)(17,20,23,19,22,29,21,30)(18,24,27,32,26,28,25,31)(1,3,4,8)(2,6,5,7)(17,21,22,23)(18,25,26,27)(19,29,30,20)(24,32,28,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.