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