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