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