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