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