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