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