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