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