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