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