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