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)(20,27)(22,29)(23,28)(25,31)(33,34)(35,43)(36,41)(37,40)(38,42)(39,45)(44,47)(46,48) involution — undirected(1,3,6,12)(2,7,9,16)(4,11,5,14)(8,15,13,10)(17,18,21,24)(19,22,26,29)(20,28,27,23)(25,32,31,30)(33,35)(34,39)(36,46)(37,45)(38,44)(40,47)(41,43)(42,48)(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,16,10)(17,19,21,26)(18,22,24,29)(20,25,27,31)(23,30,28,32)(34,40)(36,37)(39,47)(41,42)(43,48)(45,46)(2,9)(7,16)(8,13)(10,15)(17,20,21,27)(18,23,24,28)(19,25,26,31)(22,30,29,32)(35,44)(39,48)(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.