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