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