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