One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10)(11,15)(12,16)(13,14)(17,18,23,36,22,27,21,26)(19,28,35,24,30,43,31,39)(20,25,37,48,33,41,34,42)(29,44,47,38,32,46,45,40)(2,5)(6,7)(10,14)(11,12)(17,19)(18,24)(20,32)(21,35)(22,30)(23,31)(25,40)(26,43)(27,39)(28,36)(29,33)(34,45)(37,47)(38,41)(42,44)(46,48) involution — undirected(1,3,4,8)(2,6,5,7)(9,11,13,12)(10,15,14,16)(17,20,22,33)(18,25,27,41)(19,29,30,32)(21,34,23,37)(24,38,39,40)(26,42,36,48)(28,44,43,46)(31,45,35,47)(9,12,13,11)(10,16,14,15)(19,30)(24,39)(28,43)(29,32)(31,35)(38,40)(44,46)(45,47)(20,33)(25,41)(29,32)(34,37)(38,40)(42,48)(44,46)(45,47) 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.