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