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