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