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