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