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