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