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