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