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