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