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