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