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