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