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