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