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