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