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