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