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