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