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