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