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