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