One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(11,16)(12,15)(17,18)(19,25)(20,27)(21,29)(22,23)(24,30)(26,28)(31,32)(6,8)(9,10,14,13)(11,15,16,12)(18,23)(20,25)(24,29)(28,31)(1,2,4,3)(5,6)(7,8)(9,11,14,16)(10,15,13,12)(17,19)(18,20)(21,26)(22,27)(23,25)(24,28)(29,31)(30,32)(1,3,4,2)(9,12)(10,11)(13,16)(14,15)(17,20)(18,19)(21,28)(22,25)(23,27)(24,26)(29,32)(30,31)(9,13,14,10)(11,12,16,15)(17,21,22,30)(18,24,23,29)(19,26,27,32)(20,28,25,31)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.