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)(23,26)(24,27)(25,29)(28,32)(30,33)(31,35)(34,36)(5,6,9,10)(7,11,8,12)(15,19)(17,20)(21,23,25,31)(22,26,29,35)(24,30,32,36)(27,33,28,34)(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)(24,32)(26,33)(28,29)(30,36)(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.