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