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