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