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