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