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