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