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