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