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