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