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