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