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