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)(15,18)(16,17)(19,20)(21,22)(23,27)(24,32)(25,29)(26,30)(28,33)(31,35)(34,36)(5,7,9,6)(8,11,12,10)(14,17)(15,19)(21,23,25,31)(22,27,29,35)(24,26,33,34)(28,36,32,30)(5,8,9,12)(6,10,7,11)(14,17)(18,20)(21,24,26,31,25,33,34,23)(22,28,30,27,29,32,36,35)(6,7)(10,11)(13,15,16,19)(14,18,17,20)(22,29)(27,35)(28,32)(30,36)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.