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