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