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)(21,22,25,28)(23,29,30,36)(24,32,34,27)(26,33,35,31)(5,6)(7,12)(8,16)(9,11)(10,13)(14,20)(15,19)(17,18)(21,23,25,30)(22,26,28,35)(24,33,34,31)(27,36,32,29)(5,7,10,15)(6,12,13,19)(8,14,9,17)(11,18,16,20)(24,34)(27,32)(29,36)(31,33)(1,3,4,2)(6,13)(11,16)(12,19)(18,20)(23,30)(26,35)(29,36)(31,33)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.