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