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