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