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