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