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