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