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)(19,24)(20,23)(21,22)(26,27)(28,32) involution — undirected(9,10,12,14)(11,13,15,16)(17,19,22,20)(18,23,21,24)(26,27)(30,31)(11,15)(13,16)(18,21)(23,24)(25,26,29,27)(28,30,32,31)(1,2,4,5)(3,6,7,8)(9,10)(11,13)(12,14)(15,16)(17,20,22,19)(18,24,21,23)(25,27,29,26)(28,31,32,30)(1,3,4,7)(2,6,5,8)(9,11,12,15)(10,13,14,16)(17,21,22,18)(19,24,20,23)(25,28,29,32)(26,30,27,31)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.