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