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