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