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