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