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