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