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