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