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