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