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