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