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