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