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