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