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