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