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