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