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