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