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)(19,21)(20,31)(22,30)(23,29)(24,27)(25,34)(26,37)(28,43)(32,42)(33,46)(35,47)(36,44)(38,39)(40,48)(41,45) involution — undirected(1,2,4,6,5,8,11,13)(3,7,10,12,9,14,15,16)(17,19,21,18,24,30,22,27)(20,28,36,25,35,40,33,41)(23,29,32,26,38,39,37,42)(31,45,46,48,47,34,44,43)(1,3)(2,7)(4,10)(5,9)(6,12)(8,14)(11,15)(13,16)(17,20,32,43,22,33,23,34,24,35,37,48,21,36,38,45)(18,25,39,46,19,28,26,31,27,41,29,44,30,40,42,47)(3,9)(7,14)(10,15)(12,16)(17,21,24,22)(18,19,27,30)(20,33,35,36)(23,32,38,37)(25,40,41,28)(26,29,42,39)(31,46,47,44)(34,48,45,43)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.