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