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