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