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