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