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