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