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