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