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