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