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