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