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