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