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