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