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