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