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