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