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