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