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