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