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