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)(14,17)(15,19)(21,22,25,28)(23,29,30,26)(24,27,32,34)(31,35,36,33)(1,2,4,3)(5,7,9,12)(6,8,10,11)(13,14,16,17)(15,20,19,18)(23,30)(24,32)(26,29)(27,34)(6,10)(7,12)(13,14,16,17)(15,18,19,20)(21,23)(22,26)(24,31)(25,30)(27,33)(28,29)(32,36)(34,35)(1,2,4,3)(5,7)(6,8)(9,12)(10,11)(13,14)(15,18)(16,17)(19,20)(21,24,25,32)(22,27,28,34)(23,31,30,36)(26,33,29,35)(1,3,4,2)(5,8)(6,7)(9,11)(10,12)(13,15,16,19)(14,18,17,20)(21,22)(23,26)(24,27)(25,28)(29,30)(31,33)(32,34)(35,36)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.