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