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