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