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