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