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