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