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