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