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