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