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