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