One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,9,15,11,16,10,14)(7,17,19,12,21,28,20,27)(8,22,24,13,25,30,23,31)(18,29,34,36,35,26,33,32)(1,2)(3,4)(5,7,10,20,11,21,9,19)(6,12,15,28,16,27,14,17)(8,18,24,34,25,35,23,33)(13,29,22,32,31,26,30,36)(1,3,4,2)(5,8,9,23,11,25,10,24)(6,13,14,30,16,31,15,22)(7,18,19,33,21,35,20,34)(12,26,17,32,27,29,28,36)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.