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