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