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