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