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