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