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