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