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