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