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