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