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