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