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