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