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)(15,20)(16,17)(18,19)(21,22,26,23)(24,29,31,27)(25,28,33,30)(32,35,36,34)(5,7)(6,10)(8,11)(9,12)(13,14,18,19)(15,20,16,17)(22,23)(24,31)(28,30)(32,36)(6,8)(10,11)(13,15,18,16)(14,17,19,20)(21,23,26,22)(24,29,31,27)(25,28,33,30)(32,34,36,35)(1,2)(3,4)(5,7)(6,10)(8,11)(9,12)(13,16,18,15)(14,17,19,20)(21,24)(22,27)(23,29)(25,32)(26,31)(28,34)(30,35)(33,36)(5,8,9,6)(7,11,12,10)(13,17)(14,15)(16,19)(18,20)(21,25,26,33)(22,28,23,30)(24,32,31,36)(27,34,29,35)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.