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