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