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)(11,15)(12,16)(13,14)(17,18)(19,28)(20,25)(21,34)(22,27)(23,30)(24,33)(26,37)(29,38)(31,43)(32,42)(35,40)(36,41)(39,45)(44,47)(46,48) involution — undirected(2,5)(6,8)(9,10)(11,16)(12,15)(13,14)(17,19,22,31)(18,23,27,40)(20,29,32,44)(21,35,37,30)(24,38,41,47)(25,39,42,48)(26,43,34,28)(33,46,36,45)(10,14)(15,16)(17,20,22,32)(18,24,27,41)(19,29,31,44)(21,36,37,33)(23,38,40,47)(25,26,42,34)(28,39,43,48)(30,46,35,45)(9,11,13,12)(10,15,14,16)(17,20)(18,25)(19,29)(21,33)(22,32)(23,39)(24,34)(26,41)(27,42)(28,38)(30,45)(31,44)(35,46)(36,37)(40,48)(43,47)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,15,14,16)(20,32)(24,41)(25,42)(29,44)(33,36)(38,47)(39,48)(45,46)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.