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