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