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