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