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