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