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