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