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