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