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