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