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