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