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