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