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