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