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