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