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