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