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