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