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