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