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