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