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