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