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