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