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