One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,28)(19,24,29,31)(20,25,30,32)(21,26,22,27)(1,3)(2,5)(4,8)(6,7)(9,11,12,15)(10,13,14,16)(17,19,23,29)(18,24,28,31)(20,22,30,21)(25,27,32,26)(10,14)(13,16)(17,20,22,29,23,30,21,19)(18,25,27,31,28,32,26,24)(2,6)(5,7)(17,21,23,22)(18,26,28,27)(19,20,29,30)(24,25,31,32)(3,8)(5,7)(17,20,22,29,23,30,21,19)(18,25,27,31,28,32,26,24)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.