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