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)(17,18,21,25)(19,23,20,28)(22,24,30,26)(27,31,29,32)(1,2)(3,4)(5,7,8,6)(9,11,13,16)(10,14,12,15)(17,19,21,20)(18,23,25,28)(22,27,30,29)(24,31,26,32)(2,4)(6,7)(17,20,21,19)(18,23,25,28)(22,29,30,27)(24,31,26,32)(6,7)(9,12,13,10)(11,14,16,15)(18,24)(22,30)(23,31)(25,26)(27,29)(28,32)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.