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