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