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