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