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