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