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