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