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