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)(17,18,21,23)(19,20,24,22)(25,26,28,30)(27,29,32,31)(3,8)(5,7)(9,10,12,13)(11,15,16,14)(17,19,21,24)(18,22,23,20)(25,26)(27,29)(28,30)(31,32)(10,13)(14,15)(18,23)(19,24)(25,26,28,30)(27,31,32,29)(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,20)(18,19)(21,22)(23,24)(25,26)(27,29)(28,30)(31,32) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,11,12,16)(10,14,13,15)(17,19)(18,20)(21,24)(22,23)(25,27)(26,29)(28,32)(30,31)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.