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