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