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