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