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