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