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