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