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