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