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