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