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