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