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