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