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