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