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