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