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