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