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