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)(18,23)(19,27)(21,35)(25,37)(26,38)(28,43)(29,30)(31,42)(32,33)(36,40)(44,47)(45,46) involution — undirected(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,18,21,23,22,26,35,38)(19,24,29,36,30,41,27,40)(20,31,33,42,34,37,32,25)(28,44,43,48,46,47,45,39)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,19)(18,24)(20,28)(21,29)(22,30)(23,36)(25,39)(26,41)(27,35)(31,44)(32,45)(33,43)(34,46)(37,47)(38,40)(42,48)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,20,22,34)(18,25,26,42)(19,28,30,46)(21,32,35,33)(23,37,38,31)(24,39,41,48)(27,43,29,45)(36,47,40,44)(2,8)(6,9)(7,16)(14,15)(17,21,22,35)(18,23,26,38)(19,29,30,27)(20,32,34,33)(24,36,41,40)(25,37,42,31)(28,45,46,43)(39,47,48,44)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.