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