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)(18,23)(19,27)(21,25)(28,30)(33,34,37,41)(35,39,42,38)(36,44,45,40)(43,46,48,47)(1,3,6,4)(2,7,8,9)(5,11,14,12)(10,15,13,16)(17,18)(19,24)(20,25)(21,26)(22,23)(27,31)(28,29)(30,32)(35,42)(38,39)(43,48)(46,47)(2,8)(7,9)(10,13)(15,16)(19,27)(24,31)(28,30)(29,32)(33,35,37,42)(34,38,41,39)(36,43,45,48)(40,46,44,47)(1,2)(3,9)(4,7)(5,10)(6,8)(11,16)(12,15)(13,14)(17,19)(18,24)(20,30)(21,29)(22,27)(23,31)(25,32)(26,28)(33,35)(34,39)(36,43)(37,42)(38,41)(40,47)(44,46)(45,48) involution — undirected(1,4,6,3)(2,9,8,7)(5,12,14,11)(10,16,13,15)(17,20,22,26)(18,25,23,21)(19,28,27,30)(24,29,31,32)(33,34)(35,38)(36,40)(37,41)(39,42)(43,46)(44,45)(47,48)(1,5)(2,10)(3,11)(4,12)(6,14)(7,15)(8,13)(9,16)(17,21,22,25)(18,26,23,20)(19,29,27,32)(24,28,31,30)(33,36,37,45)(34,40,41,44)(35,43,42,48)(38,46,39,47)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.