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