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