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