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