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