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