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