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