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