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