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