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