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