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