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