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