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)(14,17)(18,20)(21,22,26,25)(23,29,31,27)(24,32,34,28)(30,35,33,36)(5,7)(6,10)(8,11)(9,12)(15,19)(18,20)(21,23,26,31)(22,27,25,29)(24,33,34,30)(28,36,32,35)(6,11)(7,12)(13,14,16,17)(15,18,19,20)(21,23)(22,27)(24,30)(25,29)(26,31)(28,35)(32,36)(33,34)(1,2,3,4)(5,7)(6,8)(9,12)(10,11)(13,14)(15,18)(16,17)(19,20)(21,24)(22,28)(23,30)(25,32)(26,34)(27,35)(29,36)(31,33)(5,8)(6,7)(9,10)(11,12)(13,15)(14,18)(16,19)(17,20)(21,25,26,22)(23,27,31,29)(24,32,34,28)(30,35,33,36)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.