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