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