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