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