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