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