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