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