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