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