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