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