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