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