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