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