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