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