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