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