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