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