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