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