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