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