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)(21,22,26,30,25,29,34,36)(23,31,32,28,24,27,33,35)(5,6,8,9)(7,10,11,12)(13,14,16,18)(15,20,19,17)(21,23)(22,27)(24,25)(26,32)(28,36)(29,31)(30,35)(33,34)(7,11)(10,12)(13,15,16,19)(14,17,18,20)(21,24,25,23)(22,28,29,35)(26,32,34,33)(27,30,31,36)(2,4)(5,7,8,11)(6,10,9,12)(23,24)(27,31)(28,35)(32,33)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.