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