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