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