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