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