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