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