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