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