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