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