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