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