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