One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(10,11)(12,16)(17,18)(19,23)(20,22)(21,24)(25,26,29,30)(27,28,31,32)(3,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,19)(18,23)(20,21)(22,24)(25,26,29,30)(27,28,31,32)(2,5)(6,8)(10,11)(12,16)(18,20)(19,24)(26,30)(27,31) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,11,13,10)(12,15,16,14)(17,20,22,18)(19,21,24,23)(25,27)(26,28)(29,31)(30,32)(1,3)(2,6)(4,7)(5,8)(9,12,13,16)(10,14,11,15)(17,21)(18,19)(20,24)(22,23)(25,28)(26,27)(29,32)(30,31)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.