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