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