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