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