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