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