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