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