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