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