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