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