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