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