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