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)(11,15)(12,14)(13,16)(18,21)(19,23)(27,31)(30,32) involution — undirected(1,2,4,6)(3,5,8,7)(9,11,14,13)(10,15,12,16)(19,23)(22,24)(1,2)(3,7)(4,6)(5,8)(9,10,14,12)(11,16,13,15)(17,18)(19,22)(20,21)(23,24)(25,26,29,28)(27,30,31,32)(1,2)(3,7)(4,6)(5,8)(9,12,14,10)(11,15,13,16)(17,19,20,23)(18,22,21,24)(25,27)(26,30)(28,32)(29,31)(1,3)(2,5)(4,8)(6,7)(9,13,14,11)(10,15,12,16)(17,18)(19,22)(20,21)(23,24)(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.