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