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