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