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