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