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