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