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