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