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