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