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