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