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