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