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