One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(7,8)(9,10,15,12)(11,14,17,18)(13,20,22,16)(19,21,24,23)(25,26)(27,31)(28,32)(29,30)(33,39)(34,37)(35,40)(36,38)(1,2,5,6)(3,7,4,8)(9,11)(10,14)(12,18)(13,19)(15,17)(16,23)(20,21)(22,24)(26,30)(31,37)(32,38)(39,40)(1,3,5,4)(2,7,6,8)(10,12)(11,17)(16,20)(19,24)(25,26)(27,31)(28,32)(29,30)(33,39)(34,37)(35,40)(36,38)(9,12,15,10)(11,18,17,14)(13,20,22,16)(19,21,24,23)(1,4,5,3)(2,8,6,7)(9,13)(10,16)(11,19)(12,20)(14,23)(15,22)(17,24)(18,21)(25,27,29,34)(26,31,30,37)(28,35,36,33)(32,40,38,39)(9,14,15,18)(10,17,12,11)(13,21,22,23)(16,19,20,24)(25,28,29,36)(26,32,30,38)(27,33,34,35)(31,39,37,40)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.