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