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