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