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