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)(21,22,25,29)(23,31,32,36)(24,30,26,28)(27,34,35,33)(5,6,8,9)(7,10,11,12)(13,14,16,17)(15,19,20,18)(23,32)(27,35)(31,36)(33,34)(2,4)(7,11)(10,12)(13,15)(14,18)(16,20)(17,19)(21,23,25,32)(22,27,29,35)(24,34,26,33)(28,36,30,31)(5,7,8,11)(6,10,9,12)(15,20)(18,19)(22,28)(24,26)(27,36)(29,30)(31,35)(33,34)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.