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