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