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