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