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