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)(15,18)(16,17)(19,20)(22,28)(24,30)(25,26)(29,31)(32,33)(35,36)(5,7,8,11)(6,9,10,12)(14,17)(18,20)(21,22,25,28,27,30,26,24)(23,31,32,29,34,35,33,36)(6,10)(9,12)(14,17)(15,19)(21,23,27,34)(22,29,30,36)(24,35,28,31)(25,33,26,32)(2,4)(13,15,16,19)(14,18,17,20)(21,24,26,30,27,28,25,22)(23,29,33,31,34,36,32,35)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.