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