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