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