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