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