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