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