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