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