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)(19,29)(20,25)(21,26)(22,28)(23,27)(24,30)(31,32)(2,5)(6,7)(9,10)(11,15)(12,16)(13,14)(17,19,21,30)(18,24,26,29)(20,22,31,23)(25,27,32,28)(10,14)(15,16)(17,19,22,20,21,30,23,31)(18,25,27,29,26,32,28,24)(9,11,13,12)(10,15,14,16)(17,20,23,19,21,31,22,30)(18,24,28,32,26,29,27,25)(1,3,4,8)(2,6,5,7)(9,12,13,11)(10,16,14,15)(18,26)(24,29)(25,32)(27,28)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.