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