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