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