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