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