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