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