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