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