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