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