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