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