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