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