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