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