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