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