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