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