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