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