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