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