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