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