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)(19,28,30,23)(20,27,31,24)(21,32,29,25)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,19,22,30)(18,23,26,28)(20,21,31,29)(24,32,27,25)(1,3,5,4)(2,7,6,8)(10,14)(11,15)(17,20,22,31)(18,24,26,27)(19,29,30,21)(23,25,28,32)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(17,21,20,19,22,29,31,30)(18,25,27,23,26,32,24,28)(2,6)(7,8)(18,26)(23,28)(24,27)(25,32) 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.