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