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