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