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