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