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