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