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