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