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