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