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