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