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