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