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