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