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