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