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)(11,13)(12,14)(15,16)(17,18,21,26)(19,28,30,23)(20,32,33,24)(22,25,35,27)(29,36,42,41)(31,38,44,37)(34,40,45,39)(43,46,48,47)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19)(18,23)(20,29)(21,30)(22,31)(24,36)(25,37)(26,28)(27,38)(32,41)(33,42)(34,43)(35,44)(39,46)(40,47)(45,48)(10,14)(13,16)(17,20,21,33)(18,24,26,32)(19,29,30,42)(22,34,35,45)(23,36,28,41)(25,39,27,40)(31,43,44,48)(37,46,38,47)(18,25)(22,35)(23,37)(24,39)(26,27)(28,38)(31,44)(32,40)(34,45)(36,46)(41,47)(43,48) involution — undirected(1,3,4,7)(2,6,5,8)(19,30)(23,28)(29,42)(31,44)(36,41)(37,38)(43,48)(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.