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