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