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