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