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