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