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