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