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