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