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