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