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