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