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