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