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