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