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