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