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