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