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