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