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)(19,21)(20,25)(22,24)(23,26)(27,29)(28,30)(31,32)(34,39)(37,45)(40,46)(44,48) involution — undirected(1,2)(3,7)(4,11)(5,6)(8,13)(9,14)(10,16)(12,15)(17,19,22,26)(18,23,24,21)(20,27,30,32)(25,31,28,29)(36,43)(40,46)(42,47)(44,48)(2,6)(3,9)(8,11)(10,12)(18,24)(21,23)(25,28)(29,31)(33,34,38,39)(35,37,41,45)(36,40,43,46)(42,44,47,48)(1,3)(2,7)(4,12)(5,9)(6,14)(8,16)(10,13)(11,15)(17,18)(19,23)(20,28)(21,26)(22,24)(25,30)(27,29)(31,32)(33,35,38,41)(34,37,39,45)(36,42,43,47)(40,44,46,48)(1,4,5,13)(2,8,6,11)(3,10,9,12)(7,15,14,16)(17,20)(18,25)(19,27)(21,29)(22,30)(23,31)(24,28)(26,32)(33,36)(34,40)(35,42)(37,44)(38,43)(39,46)(41,47)(45,48)(1,2)(3,7)(4,8)(5,6)(9,14)(10,15)(11,13)(12,16)(17,21,22,23)(18,26,24,19)(20,29,30,31)(25,32,28,27)(33,37)(34,41)(35,39)(36,44)(38,45)(40,47)(42,46)(43,48)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.