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