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