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