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