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