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