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