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