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