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