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