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