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