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