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)(19,28)(20,32)(21,26)(22,37)(23,27)(24,30)(25,35)(29,44)(31,40)(33,48)(34,43)(36,42)(38,41)(39,46)(45,47) involution — undirected(17,19,23,31)(18,24,27,41)(20,33,35,29)(21,30,22,38)(25,39,32,47)(26,40,37,28)(34,46,36,45)(42,44,43,48)(1,3)(2,7)(4,11)(5,14)(6,12)(8,15)(9,16)(10,13)(17,20,22,34,23,35,21,36)(18,25,26,43,27,32,37,42)(19,29,30,46,31,33,38,45)(24,39,28,44,41,47,40,48)(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,16,10)(17,21,23,22)(18,26,27,37)(19,30,31,38)(20,34,35,36)(24,40,41,28)(25,42,32,43)(29,45,33,46)(39,44,47,48)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.