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