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