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