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