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)(17,18,22,25)(19,27,20,24)(21,30,31,26)(23,29,32,28)(1,2)(3,5)(4,6)(7,8)(17,19,22,20)(18,23,25,32)(21,29,31,28)(24,30,27,26)(1,3)(2,5)(4,7)(6,8)(10,13)(11,16)(14,15)(17,20,22,19)(18,24,25,27)(21,29,31,28)(23,30,32,26)(2,6)(5,8)(10,14)(13,15)(18,25)(19,20)(26,30)(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.