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