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