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