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