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