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