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