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)(11,15)(12,13)(14,16)(18,24)(19,29)(20,31)(21,23)(25,30)(26,32) involution — undirected(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,18)(19,30)(20,32)(21,27)(22,24)(23,28)(25,31)(26,29) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,19,21,31,22,20,23,29)(18,25,28,30,24,26,27,32)(9,11,12,16)(10,14,13,15)(17,20,21,29,22,19,23,31)(18,26,28,32,24,25,27,30)(2,5)(6,8)(17,21,22,23)(18,27,24,28)(19,31,20,29)(25,32,26,30)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.