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