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)(23,26)(24,25)(27,28)(29,30,33,32)(31,35,36,34)(2,4)(6,9)(7,11)(14,17)(15,20)(22,24)(23,27)(29,31,33,36)(30,34,32,35)(5,6,8,9)(7,10,11,12)(13,14)(15,19)(16,17)(18,20)(21,23,25,27)(22,26,24,28)(29,31)(30,34)(32,35)(33,36)(1,2)(3,4)(5,7,8,11)(6,10,9,12)(13,15,16,20)(14,18,17,19)(21,24,25,22)(23,26,27,28)(29,32,33,30)(31,34,36,35)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.