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