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