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