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