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