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