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