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