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