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