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