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