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