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