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