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