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