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