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