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