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