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