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