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