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