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