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