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