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