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