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