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