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