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