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