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