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