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