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