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