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