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