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