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