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