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