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