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