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)(21,22,24,28,26,30,25,29)(23,31,34,36,35,32,33,27)(1,2)(3,4)(6,11)(8,9)(12,18)(13,14)(15,16)(19,20)(21,22,24,28,26,30,25,29)(23,32,34,27,35,31,33,36)(2,4)(5,7,10,17)(6,12,14,20)(8,15,9,16)(11,18,13,19)(21,23,26,35)(22,27,30,36)(24,33,25,34)(28,32,29,31)(5,8)(7,15)(9,10)(11,13)(16,17)(18,19)(21,24,26,25)(22,28,30,29)(23,33,35,34)(27,32,36,31)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.