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