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