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