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)(35,37,43,39)(36,40,44,47)(42,45,48,46)(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)(36,44)(40,47)(42,48)(45,46)(2,8)(4,14)(7,10)(11,12)(18,23)(19,26)(24,29)(27,32)(33,35,38,43)(34,39,41,37)(36,42,44,48)(40,46,47,45)(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)(33,35)(34,37)(36,42)(38,43)(39,41)(40,45)(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)(33,36)(34,40)(35,42)(37,45)(38,44)(39,46)(41,47)(43,48) 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)(34,35)(36,45)(38,39)(40,42)(41,43)(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.