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