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