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