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)(11,14)(12,16)(13,15)(17,18,21,26,22,24,29,31,20,25,23,30,19,27,28,32)(2,5)(3,7)(9,11,13,12)(10,14,15,16)(17,18,23,30,22,24,28,32,20,25,21,26,19,27,29,31)(9,12,13,11)(10,14,15,16)(17,19,20,22)(18,24,25,27)(21,28,23,29)(26,31,30,32)(1,3,4,7)(2,6,5,8)(17,19,20,22)(18,24,25,27)(21,28,23,29)(26,31,30,32)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.