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