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