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